Gas meter valve cover and valve seat sealing performance detection device

Abstract

The invention provides a gas meter valve cover and valve seat sealing performance detection device, and belongs to the field of gas meter detection auxiliary equipment. The device comprises a fixed apparatus for installing a valve seat, an air exhaust apparatus, a detection apparatus, a negative pressure pump and a drive apparatus, wherein the output shaft of the drive apparatus is used for driving and connecting a valve cover, and driving the valve cover to rotate relative to the valve seat. A sealed region is formed among the valve seat, the valve cover and the fixed apparatus, and the sealed region is communicated with an air inlet of the air exhaust apparatus. The outlet of the air exhaust apparatus is connected with the detection apparatus, and the detection apparatus is connected with the negative pressure pump. The detection apparatus judges the sealing performances of the valve seat and the valve cover according to the leakage amount of gas in a rotating process of the valve cover. The device is simple and reasonable in structure, is convenient to manufacture and machine, is convenient to operate, and can achieve the accurate dynamic detection of a leaked flow of the valve seat and the valve cover. The obtained sealing result accords with the application standard of a gas meter in a better way.

Description

technical field [0001] The invention relates to the field of gas meter detection auxiliary devices, in particular to a gas meter valve cover and valve seat sealing performance detection device. Background technique [0002] At present, there are two methods for testing the tightness of the valve seat and bonnet of the domestic gas meter. The first method is to test the flatness and roughness of the valve seat and bonnet separately, and judge whether the sealing performance is qualified through indirect testing; the second method is to seal and fix the valve seat on the base, place the bonnet on the valve seat, and use Negative pressure checks the tightness of the seat and bonnet when it is at rest. [0003] The inventor found in the research that there are at least the following shortcomings in the traditional valve seat and bonnet tightness detection process: [0004] First, the disadvantage of the first method is that the detection of flatness and roughness can only esti...

AI Technical Summary

Problems solved by technology

[0004] First, the disadvantage of the first method is that the detection of flatness and roughness can only estimate the tightness and cannot directly detect the leakage flow between the valve seat and the valve cover, and the detection accuracy is low;

[0005] Second, the second method can only detect the leakage flow between the valve seat and the valve cover when the valve seat and the valve cover are still in a fixed position, and the scope of application is small

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